package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        // 把前端传来的数据用 DigestUtils 工具加密成md5 然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            // 密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        // DTO只是单纯用作方便前端传过来的数据
        // 假如要传到持久层(mapper)还是用实体类更好
        Employee employee = new Employee();

        // 对象属性拷贝 源 -> 目标
        BeanUtils.copyProperties(employeeDTO,employee);

        // 设置状态
        employee.setStatus(StatusConstant.ENABLE);
        // 设置密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        // 创建时间与修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//        // 设置当前记录创建人id和修改人id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);

    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO epq) {

        // PageHelper它会动态的拼接到后面一条sql语句中
        PageHelper.startPage(epq.getPage(),epq.getPageSize());

        // 名字查找
        Page<Employee> page = employeeMapper.pageQuery(epq);

        long total = page.getTotal();
        List<Employee> result = page.getResult();

        return new PageResult(total,result);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        // Date注释的快熟构建对象
        Employee employee = Employee.builder().status(status).id(id).build();

        employeeMapper.update(employee);
    }

    @Override
    public Employee select(Integer id) {
        return employeeMapper.select(id);
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        // 使用BeanUtils拷贝对象
        Employee employee = new Employee();

        // 修改更新的值
        BeanUtils.copyProperties(employeeDTO,employee);

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }
}
